Application platform

ABSTRACT

An application platform is disclosed in a medical environment with a number of computer systems providing an information technology infrastructure and a plurality of basic information technology services to a number of users in the medical environment. At least one embodiment of the application platform provides a particularly simple and coordinated upgrade and update by independent software manufacturers and further provides a particularly high operational fail-safety during updates and upgrades by preventing damage to the systems caused by third party installer programs. To this end, at least one embodiment of the application platform includes a plurality of platform versioning building blocks and a number of platform data repositories, wherein the plurality of platform versioning building blocks are mutually independently updateable.

FIELD

At least one embodiment of the present invention generally relates to an application platform in a medical environment with a number of computer systems providing an information technology infrastructure and a plurality of basic information technology services to a number of users in said medical environment.

BACKGROUND

The use of application platforms is generally well known in the prior art. Application platforms provide the necessary background for development, deployment, installation and execution of applications in environments with a number of computer systems. These systems are sometimes organized in a client-server structure and provide an information technology structure and a plurality of basic information technology services to the users of the environment. These services may include the management of identities and roles, libraries, security features, storage and persistence features, process identification and execution, deployment models etc.

Application platforms are used to benefit from the generic application infrastructure they provide. Applications may be selected and customized according to the needs of the users in the specific environment. The infrastructure of the platform allows developers to focus on the implementation of the features useful for the user within the applications without worrying about the general framework.

In order to be able to be customized according to the needs of the users of a specific environment, an application platform usually provides features and mechanisms for extensions and upgrades/updates. An update of the platform performed by a third party software manufacturer may extend the platform, extend the applications already installed on the platform or add new applications to the platform.

Operating systems usually provide generic installer programs such as e.g. the Windows installer that provide support and uniformity regarding software installations. Such installation programs are able to manage different versions of software products and their updates.

However, these installation programs do not provide functions to assure that an update or an extension of the platform does not destroy the already installed applications or the entire platform. This is especially important in the case of updates or extensions by third party installer programs and requires deeper insight into the structure of the application platform.

If damage is caused to the application platform by a third party installer program or other sources, this affects all applications installed on the platform that use the affected platform subsystems. These applications will no longer work normally. In the case of a client-server architecture where the platform is installed on a central server—which becomes more and more common especially in medical environments such as hospitals—all clients will stop operation.

SUMMARY

Due to the above shortcomings of the prior art, application platforms therefore lack operational security regarding the implementation of changes and updates to their installed applications and the fail-safety concerning the technical consequences of these changes to the application platform itself.

Accordingly, at least one embodiment of the present invention provides an application platform in a medical environment that provides system/method for a particularly simple and coordinated upgrade and update by independent software manufacturers.

At least one embodiment of the present invention assures a particularly high operational fail-safety of an application platform during updates and upgrades by preventing damage to the systems caused by third party installer programs.

At least one embodiment of the present invention ensures the integrity of an application platform while at the same time allow the installation of applications of arbitrary software manufacturers in a particularly efficient way.

To the accomplishment of the foregoing and related ends, the invention then comprises the features hereinafter fully described and particularly pointed out in the claims, the following description and drawings setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but several of the various ways in which the principles of the invention may be employed.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from the detailed description of example embodiments given hereinbelow and the accompanying drawings, which are given by way of illustration only and are thus not limitive of the present invention, and wherein:

FIG. 1 illustrates a schematic diagram of an application platform according to an embodiment of the invention, and;

FIG. 2 shows an example embodiment of a platform updater module according to the invention.

DETAILED DESCRIPTION OF THE EXAMPLE EMBODIMENTS OF THE PRESENT APPLICATION

Various example embodiments will now be described more fully with reference to the accompanying drawings in which only some example embodiments are shown. Specific structural and functional details disclosed herein are merely representative for purposes of describing example embodiments. The present invention, however, may be embodied in many alternate forms and should not be construed as limited to only the example embodiments set forth herein.

Accordingly, while example embodiments of the invention are capable of various modifications and alternative forms, embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit example embodiments of the present invention to the particular forms disclosed. On the contrary, example embodiments are to cover all modifications, equivalents, and alternatives falling within the scope of the invention. Like numbers refer to like elements throughout the description of the figures.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention. As used herein, the term “and/or,” includes any and all combinations of one or more of the associated listed items.

It will be understood that when an element is referred to as being “connected,” or “coupled,” to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being “directly connected,” or “directly coupled,” to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between,” versus “directly between,” “adjacent,” versus “directly adjacent,” etc.).

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms “a,” “an,” and “the,” are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the terms “and/or” and “at least one of” include any and all combinations of one or more of the associated listed items. It will be further understood that the terms “comprises,” “comprising,” “includes,” and/or “including,” when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may in fact be executed substantially concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.

Although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, it should be understood that these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are used only to distinguish one element, component, region, layer, or section from another region, layer, or section. Thus, a first element, component, region, layer, or section discussed below could be termed a second element, component, region, layer, or section without departing from the teachings of the present invention.

Referring to the drawing, FIG. 1 shows an application platform 1 for medical imaging, reporting, browsing, transfer and administration applications 2 in a medical environment. These applications 2 may be supplied by third party software manufacturers and therefore may not be developed by the same manufacturer as the application platform 1 itself. The application platform 1 provides an information technology infrastructure and a plurality of basic information technology services to the users in the medical environment such as the management of identities and roles, libraries, security features, storage and persistence features, process identification and execution, deployment models etc.

To ensure the integrity and operational safety of the already installed systems of the application platform 1 after and during and upgrade or update, the application platform is divided into a plurality of platform versioning building blocks (PVBBs) 4. The platform versioning building blocks 4 are mutually independent and may be separately versioned and updated. For reasons of better readability, FIG. 1 only shows five separate platform versioning building blocks 4, however the number of such platform versioning building blocks 4 may be considerably larger.

The platform versioning building blocks 4 defined in the medical application platform 1 according to a preferred embodiment are as follows:

i. Generic Reader Task

-   -   1. Generic Viewing Master Page     -   2. Basic Viewing Content Page

ii. Image Callup Task

-   -   1. Image Callup Master Page     -   2. Extrnal Callup Content Page

iii. Report Composer Task

-   -   1. Report Composer Master Page     -   2. Report Composer Content Page     -   3. Basic Reporting Business Component     -   4. Basic Results Business Component     -   5. Report Template Data Service Component     -   6. Evidence Documents Handling Service Component     -   7. Common Reporting Data Remote Service Component

iv. Common Report Component

v. Taskflow Designer Task

vi. Task Pane Task

-   -   1. Task Pane Master Page     -   2. Task Pane Content Page

vii. Data Mapper Task

-   -   1. Data Mapper Master Page     -   2. Data Mapper Content Page

viii. Printing Task

-   -   1. Basic Printing Business Component     -   2. Print Service Component     -   3. Windows Print Remote Service Component

ix. Preprocessing Task

-   -   1. Preprocessing Job

x. Control Area Task

xi. Clinical Findings Navigator

xii. Data Publisher Task

-   -   1. Data Publisher Job

xiii. Imaging Tools

xiv. Imaging Framework

-   -   1. Basic Imaging Business Component     -   2. Basic Layout Business Component

xv. Image Processing

-   -   1. Scene Graph Service Component     -   2. Imaging Data Service Component     -   3. Display Service Component     -   4. Processing Service Component

xvi. Pipeline

-   -   1. Pipeline Service Component

xvii. Job Viewer

-   -   1. Job Viewer Task     -   2. Job Viewer Master Page     -   3. Job Viewer Content Page

xviii. Patient Folder

-   -   1. Patient Folder Task     -   2. Patient Folder Master Page     -   3. Order Content Page

xix. Browsing

-   -   1. Generic Browser Task     -   2. Generic Browser Master Page     -   3. Worklist Data View Content Page     -   4. Patient Tab Content Page     -   5. Browsing Controls     -   6. Browser Query Business Component

xx. Net Media

-   -   1. Transfer Job Preparer Content Page     -   2. DICOM Network Transfer Task     -   3. DICOM Media Transfer Task     -   4. DICOM Server Task

xxi. Service and Admin

-   -   1. Service Portal Master Page     -   2. Service Login Master Page     -   3. DICOM Local Node Configuration Task     -   4. DICOM Local Node Master Page     -   5. DICOM Local Node General Content Page     -   6. DICOM Local Node Worklist Content Page     -   7. Edit Node Content Page     -   8. DICOM Remote Nodes Configuration Task     -   9. Remote Nodes Master Page     -   10. Remote Nodes List Content Page     -   11. Add Remote Node Content Page     -   12. Remote Node Storage Send Content Page     -   13. Remote Node Storage Receive Content Page     -   14. Site Info Master Page     -   15. Software Catalog Master Page     -   16. Software Catalog Form Content Page     -   17. Software Configuration Content Page     -   18. Message Viewer Task     -   19. Message Filter Master Page     -   20. Message Pattern Query Content Page     -   21. Pattern Admin Content Page     -   22. Related Messages Content Page     -   23. Siemens Remote Services Setup Master Page     -   24. Siemens Remote Services Connectivity Content Page     -   25. Remote Services Control Content Page     -   26. Remote Services Test Content Page     -   27. Mail Target Content Page     -   28. FTP Targets Content Page     -   29. System Message Bus Content Page     -   30. Auto Reporting Content Page     -   31. Utilization Management Content Page     -   32. File Transfer Master Page     -   33. Transfer Queue Form Content Page     -   34. Auto Report Form Master Page     -   35. Status Monitoring Master Page     -   36. User Profile Management Master Page     -   37. Service Level Mapper Master Page     -   38. License Admin Master Page     -   39. License Configuration Form Content Page     -   40. License Usage Content Page     -   41. License Reservation Content Page     -   42. License Details Content Page     -   43. Init Config Master Page     -   44. DICOM Media Compression Config Master Page     -   45. License Check Job Master Page     -   46. Log Statistics Job Master Page     -   47. Utilization Send Job Master Page     -   48. Silent Installation Job Master Page     -   49. HL7 Connection Config Task     -   50. HL7 Connection Config Master Page     -   51. Remote Desktop     -   52. Basic DICOM Device Nodes Business Component     -   53. Basic Silent Installation Business Component     -   54. License Configuration Remote Service Component     -   55. Site Info Remote Service Component     -   56. Siemens Remote Service Remote Service Component     -   57. DICOM Media Compression Configuration Remote Service         Component     -   58. Autoreport Remote Service Component     -   59. File Transfer Remote Service Component     -   60. Software Catalog Remote Service Component

xxii. Web UI Framework

xxiii. Transfer Framework

-   -   1. Network Listener Task     -   2. Basic Transfer Business Component     -   3. Media Service Component     -   4. Network Service Component     -   5. Media Remote Service Component

xxiv. Data Management Framework

-   -   1. Data Management Job     -   2. Data Management Monitoring Task     -   3. Data Management Framework Configuration Service Component     -   4. Basic Data Business Component     -   5. XML Index Service Component     -   6. Data Access Service Component     -   7. Pixel Handling Service Component     -   8. File Storage Manger Service Component     -   9. File Access Service Component

xxv. Common Data Access Services

-   -   1. CDMA Service Component     -   2. File Access Remote Service Component     -   3. Information Model Manager     -   4. Memory Manager     -   5. Data Management Service Component     -   6. Data Management Remote Service Component

xxvi. Workflow Framework

-   -   1. Prefetch Task     -   2. Workflow Configuration     -   3. Basic Workflow Business Component     -   4. DICOM Worklist Access Service Component     -   5. Workflow Remote Service Component     -   6. Information Remote Service Component

xxvii. Protocol Management

-   -   1. Protocol Management Admin Task     -   2. Protocol Management Admin Master Page     -   3. Protocol Management Admin Content Page     -   4. Basic Protocol Business Component     -   5. Protocol Management Remote Service Component     -   6. Protocol Distribution Remote Service Component

xxviii. Operational Management

-   -   1. Asset Management     -   2. License Manager     -   3. Global Session Manager     -   4. Online Help Repository     -   5. System Status Monitoring Remote Service Component     -   6. Local Monitoring Service Remote Service Component

xxix. Enterprise Application Integration

-   -   1. Send Message Task Backend     -   2. Send Message Master Page     -   3. Basic Enterprise Application Integration Business Component     -   4. Information System Message Handling Service Component

xxx. Technical Architecture

-   -   1. Central Strategy Manager     -   2. Load Balancer     -   3. System Service Bus     -   4. Bootstrapper     -   5. Vortal     -   6. Starter     -   7. Libraries

xxxi. Application Infrastructure

-   -   1. System Diagnostics Task     -   2. System Diagnostics Master Page     -   3. Security Provider     -   4. Configuration Infrastructure Service     -   5. Logging Infrastructure Service     -   6. Licensing Infrastructure Service     -   7. Auditing Infrastructure Service     -   8. Tracking Infrastructure Service     -   9. Session Management Infrastructure Service     -   10. Context Management Infrastructure Service     -   11. Security Infrastructure Service     -   12. Utilization Infrastructure Service     -   13. Installation Infrastructure Service     -   14. System Diagnostics Infrastructure Service     -   15. Online Help Infrastructure Service     -   16. Lifecycle Management Infrastructure Service     -   17. Online Help Viewer     -   18. Platform Installer

The application platform 1 further comprises a number of platform data repositories (PDRs) 6 that provide data to the platform versioning building blocks 4. Again, for reasons of better readability, FIG. 1 only shows seven separate platform data repositories 6, however the number of such platform data repositories 6 may be considerably larger. In the preferred embodiment, the following platform data repositories 6 are defined:

i. Acquisition Protocols Templates Repository

ii. Acquisition Protocols Repository

iii. Central Log Repository

iv. Central Audit Repository

v. Central Utilization Repository

vi. RIS Workflow Data Repository

vii. PACS Study Repository

viii. Authorization Repository

ix. Configuration Repository

x, Application Context Folder

xi. Deployment Server

xii. Global Binary Cache

xiii. Memory Manager

xiv. Lifecycle Manager Repository

xv. License Repository

xvi. Software Depot

xvii. Report Templates Repository

xviii. Short Term Storage (for medical images)

xix. Application Templates Repository

xx. Task Templates Repository

xxi. System Service Bus Configuration Repository

xxii. User Repository

xxiii. DICOM Configuration Repository

xxiv. Online Help Repository

xxv. Display and Data Protocols Repository

The platform versioning building blocks 4 have a cycle-free and clear hierarchy, i.e. there are no mutual dependencies. This allows a separate update of each platform versioning building block 4 and the extension of the application platform 1 through adding of further platform versioning building blocks 4. Also, each platform versioning building block 4 can be extended separately.

Most, but not necessarily all platform versioning building blocks 4 have a number of assignments 8 to the platform data repositories 6. These assignments 8 may either constitute a hierarchical ownership of the respective platform versioning building block 4 or they may simply show the fact that a respective platform versioning building block 4 uses the data in a specific platform data repository 6.

For each assignment 8 of a platform versioning building block 4 to a platform data repository 6, a number of allowed actions is predefined. These actions are chosen from the group of creating, reading, updating, deleting or executing. In the preferred embodiment a platform versioning building block 4 hierarchically owning a platform data repository 6 is allowed writing accesses such as updating or deleting, whereas a platform versioning building block 4 simply using a platform data repository 6 is only allowed to read data from that platform data repository 6.

When an application 2 is installed on the application platform 1 to provide additional information technology services to the users of the application platform 1, a number of application versioning building blocks (AVBBs) 10 associated with the application 2 are deployed on the application platform 1. As shown in FIG. 1, an application versioning building block 10 may, but need not extend a platform versioning building block 4, thus forming an extension of said platform versioning building block 4. The extension is performed with the means provided and defined by the platfotin versioning building blocks 4 such as plug-ins. The application versioning building blocks 10 may also use platform data repositories 6, indicated by assignments 14. The platform versioning building block 4 owning the respective platform data repository then defines the actions (creating, reading, updating, deleting or executing) allowed to the application versioning building block 10. Because of the mutually independent structure of the application platform 1 according to embodiments of the present invention, multiple versions of an application versioning building block 10 may be deployed side-by-side. Furthermore, the applications may be delivered by different software manufacturers.

The application platform further comprises a platform updater module 20, shown in FIG. 2. The platform updater module provides a limited number of predefined update types: HotFix, Application Update, and Platform Update. For each update type, a specific set of actions chosen from the group of creating an application versioning building block, extending an application versioning building block, creating a platform versioning building block, extending a platform versioning building block and changing data in a platform data repository is allowed. The allowed actions vary depending on whether the update is effected by the application platform manufacturer or a third party software company.

Preferably, the allowed actions are further restricted if the update is effected by independent third party software. In the preferred embodiment, the allowed actions for each update type are shown in the following tables:

i. HotFix

Independent soft- Platform in vendor ware vendor installs installs Hotfix Hotfix Change of Creating a PDR Allowed according to the enabled installed Extending a PDR actions for each PDR platform Creating an AVBB Forbidden Forbidden Extending an AVBB Forbidden Allowed Creating a PVBB Forbidden Forbidden Extending a PVBB Allowed non- Forbidden breaking ii. Application Update

Platform vendor Independent soft- installs (as part of) ware vendor installs Application Update Application Update Change of Creating a PDR Allowed according to the enabled installed Extending a PDR actions for each PDR platform Creating an AVBB Forbidden Allowed Extending an AVBB Forbidden Allowed Creating a PVBB Allowed Forbidden Extending a PVBB Allowed non- Allowed breaking iii. Platform Update

Independent soft- Platform vendor ware vendor installs installs Platform (as part of) Platform Update Update Change of Creating a PDR Allowed according to the enabled installed Extending a PDR actions for each PDR platform Creating an AVBB Forbidden Allowed Extending an AVBB Forbidden Allowed Creating a PVBB Allowed Forbidden Extending a PVBB Allowed Allowed

As a component of the platform updater module 20 according to an embodiment of the invention, the platform update processor 22 coordinates the update and ensures that only the actions allowed to the specific update type are performed. To this end, the platform updater module 20 further comprises the components shown in FIG. 2.

An operating system based installer 24 such as a Windows installer tries to apply an update or an extension of the application platform 1 and thus invokes the platform updater module 20 and the platform updater processor 22. The platform updater module 20 comprises an update type detector 26 to choose and assign a predefined update type (Hot-Fix, Application Update, Platform Update) to the installer 24. Furthermore, the platform updater module 20 comprises an update owner detector 28 to determine whether the installer 24 is manufactured by the platform vendor or an independent third party company. According to the assigned update type and the detected update owner, the set of allowed actions is assigned to the installer 24.

The platform updater module 20 comprises a versioning building block extractor 30 to extract the independent platform versioning building blocks 4 and application versioning building blocks 10 to be updated. The installer 24 then applies the intended changes. The platform updater module 20 further comprises and a versioning building block change detector 32 to detect the changes to the versioning building blocks 4, 10 caused by the installer 24.

The platform update processor 22 then analyses if the detected change is allowed for the given update type, update owner, and versioning building blocks 4, 10. If the detected change is not allowed, the platform update processor invokes a rollback manager 34 which undoes the specific action or change and sets the system back into its prior state. The rollback manager 34 may even cancel execution of the installer 24. If the detected change is allowed, the platform update processor 22 invokes the versioning building block deployer 36 which deploys the changed or added versioning building blocks 4, 10 and platform data repositories 6 to the application platform 1.

Changes to the platform data repositories 6 are detected by the repositories monitor 38. If a forbidden change is detected, the rollback manager 34 is again invoked to undo the performed changes.

The solution according to the invention makes it possible to perform platform updates by independent software manufacturers such that changes to the platform are permanently controlled. This ensures that the already installed platform is not destroyed by the update.

An embodiment of the invention suggests to create a strict, non-cyclic hierarchy of versioning building blocks which provide the platform functionality. The hierarchy allows a separate update of single platform versioning building blocks, contrary to the methods of the prior art, which only allows the update of an entire platform.

Furthermore, the invention defines update types being assigned allowed changes to the platform (PVBBs and PDRs). The changes invoked by an installer are permanently controlled by a platform updater module. Changes to the platform (changes to the code of PVBBs, AVBBs and PDRs) are explicit, vary by update type and are consequently constrained. The invention may be used in connection with a standard Windows installer and may be generalized to software platforms of arbitrary domains.

A latitude of modification, change and substitution is intended in the foregoing disclosure and in some instances some features of the invention will be employed without a corresponding use of other features. Accordingly, it is appropriate that the appended claims be construed broadly and in a manner consistent with the spirit and scope of the invention herein.

The patent claims filed with the application are formulation proposals without prejudice for obtaining more extensive patent protection. The applicant reserves the right to claim even further combinations of features previously disclosed only in the description and/or drawings.

The example embodiment or each example embodiment should not be understood as a restriction of the invention. Rather, numerous variations and modifications are possible in the context of the present disclosure, in particular those variants and combinations which can be inferred by the person skilled in the art with regard to achieving the object for example by combination or modification of individual features or elements or method steps that are described in connection with the general or specific part of the description and are contained in the claims and/or the drawings, and, by way of combineable features, lead to a new subject matter or to new method steps or sequences of method steps, including insofar as they concern production, testing and operating methods.

References back that are used in dependent claims indicate the further embodiment of the subject matter of the main claim by way of the features of the respective dependent claim; they should not be understood as dispensing with obtaining independent protection of the subject matter for the combinations of features in the referred-back dependent claims. Furthermore, with regard to interpreting the claims, where a feature is concretized in more specific detail in a subordinate claim, it should be assumed that such a restriction is not present in the respective preceding claims.

Since the subject matter of the dependent claims in relation to the prior art on the priority date may form separate and independent inventions, the applicant reserves the right to make them the subject matter of independent claims or divisional declarations. They may furthermore also contain independent inventions which have a configuration that is independent of the subject matters of the preceding dependent claims.

Further, elements and/or features of different example embodiments may be combined with each other and/or substituted for each other within the scope of this disclosure and appended claims.

Still further, any one of the above-described and other example features of the present invention may be embodied in the form of an apparatus, method, system, computer program, computer readable medium and computer program product. For example, of the aforementioned methods may be embodied in the form of a system or device, including, but not limited to, any of the structure for performing the methodology illustrated in the drawings.

Even further, any of the aforementioned methods may be embodied in the form of a program. The program may be stored on a computer readable medium and is adapted to perform any one of the aforementioned methods when run on a computer device (a device including a processor). Thus, the storage medium or computer readable medium, is adapted to store information and is adapted to interact with a data processing facility or computer device to execute the program of any of the above mentioned embodiments and/or to perform the method of any of the above mentioned embodiments.

The computer readable medium or storage medium may be a built-in medium installed inside a computer device main body or a removable medium arranged so that it can be separated from the computer device main body. Examples of the built-in medium include, but are not limited to, rewriteable non-volatile memories, such as ROMs and flash memories, and hard disks. Examples of the removable medium include, but are not limited to, optical storage media such as CD-ROMs and DVDs; magneto-optical storage media, such as MOs; magnetism storage media, including but not limited to floppy disks (trademark), cassette tapes, and removable hard disks; media with a built-in rewriteable non-volatile memory, including but not limited to memory cards; and media with a built-in ROM, including but not limited to ROM cassettes; etc. Furthermore, various information regarding stored images, for example, property information, may be stored in any other form, or it may be provided in other ways.

Example embodiments being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims. 

1. An application platform in a medical environment with a number of computer systems providing an information technology infrastructure and a plurality of basic information technology services to a number of users in said medical environment, the application platform comprising: a plurality of platform versioning building blocks; and a number of platform data repositories, said plurality of platform versioning building blocks being mutually independently updateable.
 2. The application platform of claim 1, wherein said platform versioning building blocks form a cycle-free hierarchy.
 3. The application platform of claim 1, wherein a number of said platform versioning building blocks are respectively assigned to a number of said platform data repositories, and wherein said platform data repositories are at least one of hierarchically owned and used by said respective platform versioning building block.
 4. The application platform of claim 3, wherein, for each of said assignments of platform versioning building blocks to platform data repositories, a number of allowed actions is predefined, and wherein said number of allowed actions is chosen from the group of creating, reading, updating, deleting and executing.
 5. The application platform of claim 4, further comprising a number of application versioning building blocks associated with an application providing a number of information technology services.
 6. The application platform of claim 5, wherein a number of said application versioning building blocks extends a number of said platform versioning building blocks.
 7. The application platform of claim 6, wherein a number of said application versioning building blocks is respectively assigned to a number of said platform data repositories.
 8. The application platform of claim 7, further comprising a platform updater module providing a limited number of predefined update types, each of said predefined update types allowing a specific set of allowed actions, and wherein the platform updater module comprises means for choosing and assigning one of said predefined update types to an update program applied to the application platform; and means for restricting the access of said update program on the application platform to the set of allowed actions of the chosen and assigned update type.
 9. The application platform of claim 8, wherein the set of allowed actions in a predefined update type is chosen from the group of creating an application versioning building block, extending an application versioning building block, creating a platform versioning building block, extending a platform versioning building block and changing data in a platform data repository.
 10. The application platform of claim 9, wherein the set of allowed actions in a predefined update type is further restricted if said update program is a third party program.
 11. The application platform of claim 7, further comprising a platform updater module providing a limited number of predefined update types, each of said predefined update types allowing a specific set of allowed actions, and wherein the platform updater module comprises a sub-module for choosing and assigning one of said predefined update types to an update program applied to the application platform; and a sub-module for restricting the access of said update program on the application platform to the set of allowed actions of the chosen and assigned update type. 